Question 139 · LDEK · Developmental disorders of teeth
Red discoloration of permanent teeth may be caused by:
- A. chromogenic bacteria.
- B. congenital porphyria.
- C. hyperbilirubinemia in early childhood.
- D. Beltrami disease (circular caries).
- E. mercury poisoning.
Hint
Recall which inherited metabolic disorder deposits pigments in dentine that fluoresce red under ultraviolet light.
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